Fix TIFF test

config.h.in

@@ -53,9 +53,6 @@
 /* Define to 1 if libPNG is available */
 #undef HAVE_LIBPNG
 
-/* Define to 1 if you have the `tiff' library (-ltiff). */
-#undef HAVE_LIBTIFF
-
 /* Define to 1 if your system has a GNU libc compatible `malloc' function, and
    to 0 otherwise. */
 #undef HAVE_MALLOC

configure

@@ -7043,14 +7043,10 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_tiff_TIFFOpen" >&5
 $as_echo "$ac_cv_lib_tiff_TIFFOpen" >&6; }
 if test "x$ac_cv_lib_tiff_TIFFOpen" = x""yes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBTIFF 1
-_ACEOF
 
-  LIBS="-ltiff $LIBS"
+         have_libtiff=true
+         LIBTIFF_LIBS="-ltiff"
 
-else
-  have_libtiff=true
 fi
 
 

configure.ac

@@ -159,7 +159,10 @@ AS_IF([test "x$enable_tiff" != "xno"],
       LIBTIFF_LIBS="-L$withval/lib -ltiff"
       have_libtiff=true
    ], [
-      AC_CHECK_LIB([tiff], [TIFFOpen], [], [have_libtiff=true])
+      AC_CHECK_LIB([tiff], [TIFFOpen], [
+         have_libtiff=true
+         LIBTIFF_LIBS="-ltiff"
+      ])
    ])
 ], [
    AC_MSG_RESULT([no])